/Engine/Plugins/Experimental/Dataflow/Source/DataflowEditor/Public/Dataflow/CollectionSpreadSheetWidget.h
2xn grid to display Collection data
class SCollectionSpreadSheet : public [SCompoundWidget](API\Runtime\SlateCore\Widgets\SCompoundWidget)
TMap<FString, ...
AttrTypeWidthMap
TSharedPtr<SSc...
SpreadSheetVerticalScrollBar